| org.w3c.dom.DOMImplementation | 
The DOMImplementation interface provides a number of methods
 for performing operations that are independent of any particular instance
 of the document object model.
 
See also the Document Object Model (DOM) Level 3 Core Specification.
| Public Methods | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Creates a DOM Document object of the specified type with its document
 element. | |||||||||||
| Creates an empty  DocumentTypenode. | |||||||||||
| This method returns a specialized object which implements the
 specialized APIs of the specified feature and version, as specified
 in . | |||||||||||
| Test if the DOM implementation implements a specific feature and
 version, as specified in . | |||||||||||
Creates a DOM Document object of the specified type with its document
 element.
 
Note that based on the DocumentType given to create
 the document, the implementation may instantiate specialized
 Document objects that support additional features than
 the "Core", such as "HTML" [DOM Level 2 HTML]
 . On the other hand, setting the DocumentType after the
 document was created makes this very unlikely to happen.
 Alternatively, specialized Document creation methods,
 such as createHTMLDocument [DOM Level 2 HTML]
 , can be used to obtain specific types of Document
 objects.
| namespaceURI | The namespace URI of the document element to
   create or null. | 
|---|---|
| qualifiedName | The qualified name of the document element to be
   created or null. | 
| doctype | The type of document to be created or null.
   Whendoctypeis notnull, itsNode.ownerDocumentattribute is set to the document
   being created. | 
Document object with its document element.
   If the NamespaceURI, qualifiedName, and
   doctype are null, the returned
   Document is empty with no document element.| DOMException | INVALID_CHARACTER_ERR: Raised if the specified qualified name is not
   an XML name according to [XML 1.0]. NAMESPACE_ERR: Raised if the qualifiedNameis
   malformed, if thequalifiedNamehas a prefix and thenamespaceURIisnull, or if thequalifiedNameisnulland thenamespaceURIis different fromnull, or
   if thequalifiedNamehas a prefix that is "xml" and
   thenamespaceURIis different from "
   http://www.w3.org/XML/1998/namespace" [XML Namespaces]
   , or if the DOM implementation does not support the"XML"feature but a non-null namespace URI was
   provided, since namespaces were defined by XML.WRONG_DOCUMENT_ERR: Raised if doctypehas already
   been used with a different document or was created from a different
   implementation.NOT_SUPPORTED_ERR: May be raised if the implementation does not support the feature "XML" and the language exposed through the Document does not support XML Namespaces (such as [HTML 4.01]). | 
|---|
Creates an empty DocumentType node. Entity declarations
 and notations are not made available. Entity reference expansions and
 default attribute additions do not occur..
| qualifiedName | The qualified name of the document type to be created. | 
|---|---|
| publicId | The external subset public identifier. | 
| systemId | The external subset system identifier. | 
DocumentType node with
   Node.ownerDocument set to null.| DOMException | INVALID_CHARACTER_ERR: Raised if the specified qualified name is not
   an XML name according to [XML 1.0]. NAMESPACE_ERR: Raised if the qualifiedNameis
   malformed.NOT_SUPPORTED_ERR: May be raised if the implementation does not support the feature "XML" and the language exposed through the Document does not support XML Namespaces (such as [HTML 4.01]). | 
|---|
This method returns a specialized object which implements the
 specialized APIs of the specified feature and version, as specified
 in . The specialized object may also be obtained by using
 binding-specific casting methods but is not necessarily expected to,
 as discussed in . This method also allow the implementation to
 provide specialized objects which do not support the
 DOMImplementation interface.
| feature | The name of the feature requested. Note that any plus sign "+" prepended to the name of the feature will be ignored since it is not significant in the context of this method. | 
|---|---|
| version | This is the version number of the feature to test. | 
null if
   there is no object which implements interfaces associated with that
   feature. If the DOMObject returned by this method
   implements the DOMImplementation interface, it must
   delegate to the primary core DOMImplementation and not
   return results inconsistent with the primary core
   DOMImplementation such as hasFeature,
   getFeature, etc.Test if the DOM implementation implements a specific feature and version, as specified in .
| feature | The name of the feature to test. | 
|---|---|
| version | This is the version number of the feature to test. | 
true if the feature is implemented in the
   specified version, false otherwise.